工作面上方直至200米或300米处的岩层变形预计,对采矿工作者来说是很有意义的,尤其是在下列情况下: —掘进井筒时; —主要巷道掘成后的短期内,在其下部进行回采; —设计的工作面处于危险区域内,如水和瓦斯区域等; 这种变形的预计工作更有必要。西德煤矿的矿山测量者是用下述方法来解决这一问题的:根据巴尔斯1932～1939年的建议,将计算地表点的方法进一步扩充后,用以计算岩层内部的下沉。计算程序中,用工作面上方的岩层高度h来代替采深H。对于底板的岩层,这种方法的计算结果不能令人满意,这点将在下面论述。 Deformation of rock formations up to 200 meters or 300 meters above the work surface is expected to be of great interest to the miners, especially in the following cases: - when boring a wellbore; - shortly after excavation of the main roadway, at The lower part of which is to be reclaimed; - the designed working face is in a dangerous area, such as water and gas areas; the expected work of this deformation is more necessary. The mine surveyor at West Germany Mine solved this problem by using the following method: According to the recommendations from 1932-1939 by Balles, the method of calculating surface points was further extended to calculate the subsidence within the formation. In the calculation program, the depth H of the rock formation above the working face is used instead of the depth H. The calculation of this method is unsatisfactory for the rock formation of the floor, which will be discussed below.